You can choose to put a humidifier in your home, as well, if the humidity level is below 40-50%.
Avoid eating right before you sing or within 2-3 hours of going to bed, as this can increase the amount of stomach acid you produce and irritate or damage your vocal cords. [1] X Research source
Remember to avoid sugary or caffeinated beverages before singing.
Take note of your shoulders and chest. Make sure they’re relaxed and low. Make sure you channel your breaths to your lower abdomen rather than your chest. It can help to put a hand on your lower abdomen and make sure your hand rises and falls as you breathe. Hold an “S” sound as you exhale to get your vocal cords going. Repeat as many breaths as you need to feel like you’re breathing slow, deep, and steady.
For a lip trill, push your lips together and make a raspberry sound by releasing the air. Try an “h” sound, then a “b” sound, and then try to use the “b” sound to do a scale. Do as much of the scale as you comfortably can doing lip trills. For a tongue trill, put your tongue just behind your upper teeth. Exhale using an “r” sound. Try to vary the pitch while you trill. Vary the pitch as much as is comfortable for you.
Use a “me” sound to work your way up the scale. Go as high as you comfortably can. Use an “e” sound and then work your way back down the scale.
Read the lyrics online and think about each word. Ask yourself what the writer is trying to say and what underlying emotions are at play. Try to identify with the song on a personal level. For example, if a song is sad or melancholy, think of a time you’ve experienced these emotions personally.
Ensure that you memorize the song completely before the audition or performance.